There was a groundbreaking development in New York in 1912 for hair removal from corpses: the post-mortem shaving powder. That's what I always do with my corpses, powder on and off, without acid and without "offensive odor". In fact, there is still a little Background info for corpse depilation notification, apparently there were a lot of companies for corpse depilation without razor blades:
The magazine is Casket & Sunnyside for January 1912, and there are ample references to it in Charles Addams [Addams Family] and Jessica mitford. The worry for the consideration of the cost of a shave (15 cents) for a dead person seems quite an inescapable weirdness and luxury. The weirdness of the name of the company nearly obscures it common nature – it isn't exactly the Acme Corpse Company, but it is close to it, and it addresses just one small bit of minuatiae of deadness in the vast sea of Dead, Inc .
The sellers of the razorless post-mortem shave equipment didn't receive a patent for their process – nor did anyone else, for that matter, at least so far as I can determine.